A ： Who is at the door?
B: It’s me，Mr. Black.
A： Oh, Mr. Black. You are quite a special guest.
B:lt's very kind of you not to have forgotten me.
A:It’s a long time since I had the pleasure of seeing you，isn’t it?
A:自从上次有幸遇见你，我们已经久不 见了 ？
B:Yes，l called you recently,but you weren't at home.
A：I am very sorry that I was out.